Sign up for 25 DKs vs DS HC on 12.09.2012: http://eu.battle.net/wow/en/forum/topic/5208783733

Part 1 here: http://www.youtube.com/watch?v=IhEr5rilrjU&feature=player_embedded

My Guild is still recruiting for Mop (german only): http://www.nolimit-gilde.de/index.php/forums (Thx to Xurion for joining this raid)

Well actually its not 10 but 8-9 dks on most bosses.
This was done in 4.3.4 a few days before 5.0 hit and changed anything

Since we couldnt do it crossrealm it was hard to get even those 9 DKs and most of them were twinks or badly undergeared. We still managed to do 4/8 on heroic what was more than i expected.
With 10 highly geared DKs pretty much anything (maybe except spine) should work thats why i plan to do 25 dks vs DS HC soon (you can still sign up for it link above)

This part includes:

Ultraxion Heroic: with all blood it seems that just the 2 who are tanking get affected by fading light
Warmaster Blackhorn Nhc: simple, simple.. simple...
Spine nhc: couldnt try hc because we did some bosses nhc before still not that easy
Madness nhc: way easier than expected but we got mad last phase and thought just ignore any tentacles and nuke him what almost made it a wipe^^

songs:
S.S.H. - L.L. ~Infinite Being.ver~ http://www.youtube.com/watch?v=Eu8l8zkYGS8
S.S.H. - Sledge Hammer [Lost Child] http://www.youtube.com/watch?v=1jvc9dFSBS8
S.S.H. - Pegasus Illusion [Kidou Senkan Nadesico] http://www.youtube.com/watch?v=QE6LwpZ0QDM